(1) A private water trust must not make a change in membership that results in a consequential change to the works plan of the trust unless the proposed change to the works plan has been approved by at least two thirds of the members of the trust who are entitled to vote on the question.
(2) The regulations may vary the proportion of the members of the trust who must approve any such change.
(3) Any change to the works plan takes effect from the date approval is given or such other date (being an earlier or later date) as is specified in the approval.